Switch.



VV. KAISLING.

SWITCH.

APPLICATION PIL-BD FEB.18,1909.

0. 11 9 1 Ru., 1 V. 0 N d e .fu m n@ P W. KAISLING.

SWITCH.

AAPPLIGMION FILED 1213.18, 1909.

975,530. y Patented N0v.15,191o.

3 SHEETS-SHEBT 2.

W, KAISLING. SWITCH.

APPLICATION FILED FBB.18, 1909. 975,580. Patented N0v.15,1910r S SHEETS-SHEET 3.

nn'frnn sra'rnsmifagrnivr ermee.

lfilhliM KASLING, F CHCAG, ILLINOIS, ASSGN, BY MESNE- ASSIGNMENTS, TO

'HELLOGG SWITCHBOARD it SUPPLY COMPLNY, A CEtPQRA-TXON Gl? ILLNOIS.

SWITCH.

1 .nection with circuits of selective telephone systems.

l have shown theinvention embodied in a switch having Wipers adapted to be adjusted in two intersecting planes, but the invention as defined in the claims is not limited to switches of this character. i

Features of the present invention are improved arrangements for mounting the various electromagnets employed in connection with selective switches; improvedmountings y of the actuating magnets withrelation 'to the switch driving parts controlled by them;

iniiproved coperation between the primary and secondary actuating Iand Aretaining pawls, and the release magnet means; improved mechanical connecting devices by which the circuit connections of the switches may be established, and animproved resten ing spring arrangement.

The invention further includes certain detailed arrangements more particularly pointed out inthe followingfdescription and deiined in the claims.

In carrying out the present invention, I'

have given particular attention to providing a device wherein the parts most susceptible to arrangements are all so located as to be readily accessible for repairs and adjustment.

Referringlto the drawings, Figure 1 is a left elevation of a switch embodyingthel invention; the contact bank being shown in section; Fig. 2 is a front` elevation of the switch; Figxl 3 a right elevation thereof;

Fig. shows in detail the primary onf-normal combination of the switch; Fig. 5 the primary and release magnets and'associated parts; this being a sectional view on line 5-5 of Fig. 2; Fig.- 6 shows a dash-pot for the secondary shaft; Fig. 7 the method of connecting the lower end of the secondary restoring spring; Fig. Sis a front elevation showing the switch frame and its actuating" Specification of Letters Patent. v Patented NGV. i5, 19.1 .v

Application filed Febluaify 1S, 1969. Se'ial N0. 478,665.

magnet mechanism as modified and adapted to perform certain functions in addition to those required of the structure of Figs. 1 to 7; lig. 9 is a side elevation of the switch frame and' parts as so adapted; Fig. 10 shows oit -normal and primary overrun switch arrangements; while Fig.' 11 is a. sectional view on lineeof Fig. 8; Fig. 12 is a view in perspective of the lower portion of the modified switch designed to show particularly principal interlocking parts of the switch so adapted. I

Referring iirst to Figs. 1 to 3; the main switchframe is composed of the two frame plates 1i and 12. joined at right angles and. the two narrow frame members 13, 1li; member 13 extending parallel with the plate or member 11, while member 14 is parallel with plate 12. At their junction points, these gether; to form a rigid rectangular support for the remaining switch parts with the eru ception of the switch bank proper. fihe latter is preferably composed of ten groups of ten contact sets each,i and each group is preferably a self-contained unit containing ten sets of contacts 22, 23, 24e insulatingly sup* .portved between the armate plates 17, 17. Ten such units support y l vertically between curved holding members i6, 19, comprise the bankas a whole. the bank presenting an inner contact surface as of a segment of a sphere as indicated in Fig. 2, wheigein each contact set 22, 23, 24, isrepresented by a single short line. The plates 17, 17; the bank units having been placed between them,

-are held in place by the posts 20, 21, fastened at their upper eds to the plate 16, and having their lower ends extending through plate 19 and provided with nuts. The plate 16 has a vertically extending portion by which the bank may be rigidly attached to an angle iron 15 forming a horizontally extending member of the customary mounting frame.` The main switch frame may then be placed so that the angle formed by plates 11 and 12 fits in the angle of plate 16, the two being then fastened in any convenient manner7 whereby the moving parts carried by the switch frame will be in adjusted relation with the bank.

The wiper contacts 2G, 27, 28 are adapted to be first rotated step by step from left to right, each step bringing'fthem opposite a four frame members are tiOhtlv fastened to.-

. L'J y different vertically extending group of contact sets, whereafter the inwardly extending contact-making ends of the wipers are rotated upwardly, each step causing them to engage a snccessiveset of contacts :23, The 'i'st adjustment may be called'primary, and thesecond. secondary. For effecting the primary adjustment, a, rotary primary? shaft PS is provided, having a slotthrough which the member 30, which carries the wipers, extends, being pivoted at By turning shaft PS, the wiper ends will obviously be rotated beneath the lower edge of the contact bank. The primary shaft PS extends through the frame ncmbers 1'2 and 14 being `iournaled thereto and held in place by the hub 32 fastened to its upper end.

To effect the secondar,v adjustment of the wipers,secondary shaft SS is provided, extending through members 1Q and 14, said shaft being longitudinally movable down and up. dit its lower end, is fastened a member 33 having two horizontal and curved plates 34, 34, between which fits a wheel 3 1. pivoted to member 30. lllhen shaft YS is rotated, this wheel is carried sidewise between plates 34, 34, which are broad enough so that in every primary adjusted position. wheel 31 will be between them. llfhen shaft SS is moved downward, wheel 31 turns between plates 34. as wiper support 3() is ro tated on pivot 32 and the contact ends of the wipers rotate upward.

For rotating the primary shaft. magnet PM provided whose armature 49 (sec Fig. 5) carries the pivoted pawl 48. whose stop 47 is in the form of a post extending upward from frame plate 1Q. Fastened to armature 9, is a leaf-spring-having bifurcations and 51, (or two separate springs may be used), the former bearing upon pawl 48 to press it toward ratchet 45, while the latter 4'es as a restoring' spring for armature 49, ik. right end being suitably connected to a tension adjusting screw 5f), best shown in Fig. 2. The adjustable scre\v 49', provided with a lock nut` limits the back stroke of the paw] 48. By suc-essive actuations of l magnet PM. thrusts o pawl 48 will be effected, moving ratchet 45, rigid upon shaft PS step by step, whereby the wipers'reccive their primary adjustment. The spiral spring 35, having` one end fastened to shaft PS and the other to plate 14, tends to restore shaft PS, when the latter is rotated, but primary retaining pawl 4l engages successiye teeth of ratchet 45, preventing back movement. Hub 32 atthe top of shaft lS has an arm provided with a stud 6E)- which normally holds primary olf-normal spring PON in .the position shown. lVhenever shaft PS l'leaves normal, stud 69 frees said spring when the o1f-normal contacts by their tension assume their alternate positions, to be again restored by said stud when QlmFf PS restores. An arm 68 of hub 32 contacts with pin 70, extending up from plate 14 when the primary shaft reaches normal to stop it.

For movin@ secondary shaft SS downw ward to cause the secoi'idary travel of the wipers, secondary magnet SM is provided with an armature-actuated pawl 61, adapted to engage teeth of an adjacent ratchet 71 cut in shaft SS. Armature of magnet SM extends the length of the magnet spool, bcing pivoted 'at 63 to a plate of brass between pole-piece 76 and plate 11, and at 62 to a plate 75, which may be of brass, screwed to pole-piece 77 and having an angular exteni.'

sion screwed to plate 14 at 74. By this latter attachment, the forward end of magnet SX1 is rigidly held in place. This plate has fastened to it the forward and bach' stops 73 and 67 respectively for pawl 61. It also carries a lng 66, to which is fastened spring 65 for restoring the armature 60, said spring at its free end engaging a pin upon the angular plate 76, fastened to 'the armature. This plate 76 has screwed to it spring 64 for holding paWl 61 toward shaft SS. Successive actuations of armature 60 effect thrusts of pawl 61 to engage successive teeth of ratchet 71, driving shaft SS downward. As best shown in Fig. 3, a stud 80 on said shaft is loosely engaged by the forked end of a lever arm 38, pivoted to a downwardly extendingl post 37. The short arm of lever 38 is encaged by one end of secondary restoring spring 36, whose other end extends through frame plate 12 and engages a hook on the piece 39, fitting about the adjustable screws 40, threaded to plate 12. Each screw 40 has an enlarged portion 40a (see Fig. 7), against which piece 39 is drawn by spring 36. Shaftl SS is thus drive'n downward against the tension of spring 36, which would move it back were it not for secondary retaining pawl 42, pivoted to piece 44 upon frame member 13 and pressed by a spring against an adjacent ratchet 72, cut in shaft SS (see Fig. 3). Said pawl 42 engages successive teeth of the ratchet as shaft SS is moved down and holds it against back movement. The stud 30 on shaft frees stud 81, which extends SON, springs by their tension move stud 81 down and assume their alternate positions. On restoration of shaft SS, stud SO lifts stud 8l and so restores said springs. A long slot 3, cut in frame member' 13, has extending through it a pin 94, rigid upon sha ft SS, the said slot, in conjunction with the pin. serving as a guide to prevent possibility of shaft SS turning while being actuated or restored.

To restore the mechanism, it is only necessary to energize release magnet RM, whose armature 52 then engages primary retaining nawl 4l and rotates it about the post supportino; it, (Figs. and 5), to conse it to :lree ratchet 45. The back of pavvl el then s a projection 43 on secondary retain* infr peivl ffl-E5 and draws said pavvl free ot the rato iet ot shaft SS. Then spring 36 ino-ves it secondznfy oil-normal paivl 55 is pro vided (litige, 3 end 5), pivot-ed between the if'crticol guides fiel, mounted on "frame plate l2a An extension of piece on shaft SS normally engages the horizontal erin or' porvi ,55 and holds it in such position that the lrnite edge 55a isA clear of the adjacent priinary ratchet' @n the tiret etep ot shaft SS, piece 33 clears pevvl titi, whereupon spring nieves seid pevvl to engage any adjacent 'tooth of ratchet fili. Thus When shaft is restoring, pavvl 55, being;` in engagenientjvith ratchet fifi, 'connteractsthe tension of spring 35 While the paivl el is dieengegede When shaft SS reaches normal, et which time thewipers will be tree ofthe edge ot' the Contact bank, piece 33 rotates pevvl to tree ratchet l5 and spring is eltective to restore the primary shaft.. y

W hen the switch above described is eniployed for line selecting purposes, it is necessary to have a so-celled group contract for" each group of Contact sets., l lieve indicated these at 25. The group Wiper is rigid upon shaft PS and 'is thus actuated and restored by the primary adjusting ineens.

Having considered the general constriiction oi' the switch and itsoperetion, soine more specic details o iinprovenfient will nent be referred to. I

lt will be noted that ell electroniegnets mounted lon the switch mechanism extend horizontally, or at right angles with the shafts, and each magnet is at its rear screwed to the one :traine plate ll, being individually detachable. According to this arrange- -inent the terminals 82 83,. 84e of the rneonets SM, lult/l' and RM, respectively, ere extended bthrough suitable orir'ices in plete il, so that they all appear adjacent to one another on one sind the seine side of the switch. Moreover, when, as Will sometimes be :tonnel con venient, en electroinagnet having relay springs is to be mounted upon the switch trame, the terminals of such relay springs 'will be led through en opening in plate 1l, just as irre the terminals S2, 83, 84. By this means, ell soldered connections (except of connrse those of' the conductors of cord 87 'to the wiper contacts) are placed on an open 'plane surface, adjacent to one another and perfectly accessible... n

iifhe otr sgrings 85 ere mounted upon freine plete lll' es to be adjacent to the electroinegnet terminals and the spring terminals, to which they niey be connected by short wires, as required by the system for .i led through the seid shaft.

l't will be observed that the priinery inegnet PM, with its armature, its prlivl, andthe y springs for the armature and pewl, 1s e scltcontained unitary device capable of being removed in zi ferr seconds by the loosening' of its attechingv screws, whereupon another properlyladjusted one moy be es quickly in its place. The saine is true otfinegnet and its associated parts, the magnet in this cese not only carrying the parts mentioned, but the front and beck stops for pawl til. Release magnet Rit/l is olso a readily removable unit, but of cou-rse does not support its controlled pan/l elw te indicated in Fig. 6, a dash-pot 89 is fastened to freine plete l2, in which e plunger or piston 90, fastened to shaft SS, nornialy rests.` .de shaft SS reaches normal zitter being actuated es before described, plunger 90, in entering dash-pot 89, encounters an air cushion end the ier occurring on restoration is ineterielly reduced.

rlhe niodicetion of the switch, vshown in Figs. 8 to l2, rnoy be used in connection with various circuit arrangements; for exemple, with a. circuit such as that shown et the right of lig. l, Part l, in the epplicetion of H Dyson, Serial No. Sel, filed iloveinber 7, 1906, Jor telephone systems, ln the structure of Figs. 8 to i2, the saine bank and wiper arrangements used in the structure already described are employed, and the priinery and secondary shaft and oitnorinal Contact provisions are the saine. ln lfigs 8 to l2., the primery and secondary magnets, their pewl and ratchet mechanisms, are like those of the preceding lignres ond operate in like manner.. Mounted upon the modified switch non7 being,` considM ered, are four contact springs 79, 163, 82

end i022 and these springs are to be shifted' to close their alternate contacts after the secondery` magnet completes its operation and before release magnet iltllft releases thel selector. Upon the front ot magnet Rlvil, is

'pivoted at points 107 en irregular shaped member t0n, carrying' upon its top surface e peiroirstudsld, 109, Whereotltl'no'rmally lies'within and between the bent cam surface ends of springs T', 100, while stud 100 occupies a corresponding position with respect to the ends of springs 82, 102. fr coi rolling magnet 102 is carried by the switch frame. being directly above said springs, which has` an armature 12; with a` suitably pirotrd hook 121. when magnet is cncrgircd, armature 122 moves hook 121 so that it slips over the top of member 106 into engaging relation therewith. illu-.n magnet 162 thereafter denergized, its mature is spring` retracted and pawl 121 draws member 100, tilting it about its pivots, outwardly with respect to the associated springs, so that studs S, 100, aci'l upon the bent cam surfaces of their respective springs to force them apart to their alternate positions. rEhe restoration of there parts is et'- fected by magnet RM as hereafter described. i1 socalled release switch contact RSV is included in the modified structure, being' 'arranged to be shifted'to its alternate position on the first actuation of magnet PM and to be restored upon the energization ot magnet 11M. Additional features contained in the structure ot Figs. 8 to 12, as compared with the lirst described mechanism, include provisions for holding the 'primary and secondary actuating pawls 11, 412, normally disengaged from their asso ciated ratchet and for placing them in en gaging relation with said ratchets on the first primary step. Also a so-called primary over-run contact POR, adapted to be closed by stud 69 on an eleventh primary step,and a secondary over-run contact SOR adapted to be closed by an arm 90 fastened to shaft .SS on an eleventh secondary step, are provided.

Considering now the general operation of the mechanism of Figs. S to 11, actuations of primary magnet PM are first caused etecting primary adjustment of the primary shaft and wipers as before. On the vfirst actuation of magnet. PM, an arm 98 upon armature 419 engages a reciprocating member 101, pivoted at 90, 100, tilting its upper surface projection 10:3 to engage an uprising forwardly extending projection of the pawl member 120, which is pivotally supported at 118, 119, upon an arm 111 carried by armature 52 of magnet RM. As the upper part,

of member 101 moves toward frame plate 11,

member 120 is raised until its pawl 103 is lifted free of a pin 125 upon secondary retainingr pawl which is then free to be moved by its spring` against secondary shaft SS. Pin 125 extends through pawl and normally holds pawl L11 free of ratchet wheel 45, but when paw] moves to shaft SS, pin 125 is drawn away from pawl 11 and the latter is spring-moved to engage the ratchet. As the movement of member 101 continues,

projection 105 comes beneath an offset 101- in member 120 and the latter drops slightljgf so that an interlock exists at 101105, mem ber 101 being then held in tilted position independently dit' arm 98 controlled by magnet PM. 3y the tilting of member 101, its an gular extension 102 is raised to shift spring RSU" from its lower to its upper Contact and while the interlock at 1.01:#10'5 continues. said spring will be maintained inshifted position. Actuations of prin'iary magnet PM, after the first one, serve on., o advance the primary 'shaft mechanism.. fitter the primary adjustment is completed, actuations of magnet SM are caused to effect the secondary wiper adjustment, as before. After this control magnet 162 is energized and deenergized, its armatiue-controll'ed hook 121 operates upon member 106 te move studs 10%100 to shift their associated springs as before described. The mechanism is then in fully operated position and is ready for restoration upon the energization and denergization of release magnet RM. Upon the energization of said magnet, release switch RSVV is restored to normal, and upon the subsequent denergization contact springs 79163 and 82-102 are restored; also upon dener'gization, retaining pawls 11, 12 are withdrawn from thei1"ratchets and the .'ipers and ott-normal switches are restored upon the restoration of shafts PS' and SS occurring as before. It willjbe noted that the present structure diif'ersf from that first described, in that `the shafts are now restored upon the denergaation of the release magnet, instead of upon its energization.

The armature 52 of magnet RM is carried at one side, being pivoted at 11,4, 115, and has an associated adjustable stop screw 110. Upon energization, the lower edge of armature 52 is drawn toward the shafts PS and SS, and'pawl member 120 is advanced suf-v iciently so that the interlock at 101, 105 is broken Then spring BSW@ by its tension, is able to force extension 102 down, whereby member 101 is restored to normal as well as the spring BSW. As projection 105 comes clear of member 120, the latter drops down and its pawl end 103 then engages pin 125, ready to withdraw pawl Llf2 when armature 52 retracts. The element 111, carried by armature 52, has, above, an angularly ex-- tending finger member whose end rests just below hook 121. The energization of ma'gnet Ril raises said end up, which then lifts the hook to free the me1nbe1'-106, which then moves slightly so that its upper edge is be low the horizontal surface of hook 121. Such movement is, however, .not suicient to allow restoration of the'springs controlled by studs 108, 109, because a pin 112 in member 111 interlocks with a downwardly extending finger 110 of member 106. so as to emesse' 'hold the latter in almost fully. operated position as long .magnet RM remains energized. When said .magnet deenergizes, armature 52 withdraws pin 112 and.,l by the tensionof the cam surfaces of springs 79, 168, 82 102', the studs 10S-109 are moved toward plate 11 and the said springs and element 106 are restored to normal. The re-I traction of armature 52 further draws paWl member 120 to normal, whereby pawl 42 is Withdrawn from its ratchet and pin 125 withdraws pawl 41 and the shafts and their mechanism are free to restore. The springs 100 are in an obvious manner shifted and restored on energization and denergiza'tion of magnet RM, respectively.

In illustrating the invention, I have p shown mounted upon the switch frame only -such electromagnets as control operating ,parts beyond what an ordinary relay magnet controls. It is frequently employed practice to mount relays controlling local circuits of switch adjusting magnets upon the switch frame itself. Such electromagnets would, it this practice were followed, be n'ioun'ted upon the back plate'll and extend parallel with magnets PM, SM and RM, their magnet terminals and contact terminals havingtheir connecting ends led out through to the back of plate 11. The claims, when referring to electromagnet or magnet terminals or contacts, EWithout an especial limiting` clause, are not limited in any Way to elements of switcl'radjusting magnets.

A circuit .adapted to be employed in connection with the switch structure of Figs. 1 to 7 is illustrated in the application of Alfred H. Dyson, Serial No. 389,180,.led August 10, 1907, at Q in Fig. 1, Part 1. Such a switch structure, Without the use of the wiper 2f), may, also be used in connection with directively operated switch circuits, for example, such circuits as shown at ll, V or lV in Fig. 1 of said application.

lVhen an individual circuit breaker or interrupter is emliloyed for the primary' or secondary magnet ot' the. switch s tructi'ires shown, they are preferably of the type shoivn in the il. S. patentfto Kaisling, 874,511, dated December 24, 1907. Such an interrupter for the primary magnet'may be mounted directly int'rout oi. the armature upon the frame platek 12, while that 'for a seconda ry magnet may be carried by the plate upon magnet SM' in like shown in said patent.'

vThe invention may be a-ppli'ed in various ln'ianner, as

vways and modified to' a considerable extent Withoutdeparting from its scope.

- That I claim is: l

1. An autou'iatic telephone switch structure comprising a frame, a=`bank of contacts secured to said frame, acoperatingwiper,

means for ad\ fan'cinar said wiper to said conrestoring it to normal, and electromagnets for controlling said advancing and releasing means individually detachably secured to saidY frame and having their terminals alli exposed for connection at one and the same side of the switch structure.

2. An automatic. telephone switch strucn ture comprising a frame, a bank of contacts secured to said frame and having their connecting ends exposed for connection at one side of the switch structure. a. coperating Wiper, means for advancing said Wiper to said contacts, means for releasing said Wiper and restoring it to.normal, and electromagnets for controlling said advancing and releasing means individually detachably secured to saidframe and having their terminals all exposed. at the samev side ot the switch structure as the connecting ends of said bank contacts.

rture comprising a frame, bank contacts ar ranged in a plurality of rows, a coperating Wiper, means for advancing said Wiper by a primary motion to the differentrovvs of bank contacts, means for subsequently advancing .said Wipen'by a secondary motion to the contacts of a selected'row, means for reieasiiig said Wiper and restoring it to normal, and three electromagnets for controlling respectively said primary and secondary advancing and said releasing means, individually detachably secured to said frame and having .their terminals all exposed for connection t at one and the same side of the switch structure.

a. An automatic telephone switchv structure con'iprising a trame, bank contacts arranged in a plurality of rows and having their connecting ends exposed for connection at one side of the switch structure, a cooperating Wiper, means for advancing said wiper by a primary motion to the different rows of said contacts, means for advancing said wiper by a secondary motion to the contactsot' a selected row, means for releasing said wiper and restoring it to normal. and three electromagnets for controlling respectively said primary and secondary advancing and said releasing means; individually detachably secured to said frame and having their terminals all exposed for -connection at the same ,side of said framevas the connecting ends ofmsaid bankcontaots.

5. An automatic telephone switch structure comprising a frame, a bank-0f contacts secured to said-frame, a coperating Wiper, means for advancing said Wiper to saidrcontacts, means for releasing said Wiper and' re# storing it to normal, electromagnets for controllinef said advancing and releasing means indivi ually detachably secured to said frame and having their terminals all esn tacts, means for releasing said Wiper and 3. An automatic telephone switch struc' posed for side of the switch structure, a row of jacks on the same side of said structure, and con ductors electrically connecting said terminals and jacks.

G. An automatic telephone switch structure comprising a frame, a bank of contacts secured to said tranieard having their connecting ends exposed for connection at one side of the switch structure, a cooperating wiper, means for advancing said wiper to said contacts, means for releasing said wiper and restoiing .it to noi-mal, electromagnets for controlling said advancing and releasing means indivilually detacliably secured to said frame and having their terminals all exposed at the same side of the switch struc ture as the connecting endsl of said bank contacts, a row ot' jacks on the same side ot' said structure, and conductors electrically connecting said terminals and `iacks.

T. An automatic telephone switch4 structure comprising a trame, bank contacts arranged in a plurality ot rows, a cooperating wiper, means for advancing said wiper by a primary motion to the different rows of bank contact-s, means for subsequently advancing said wiper by a secondary motion to the contacts of a selected row, means tor releasing said wiper and restoring it to normal, three electromagnets 't'or controlling respectively said primary and secondary advancing and said releasing means, individually dctaehably secured to said frame and having their terminals all exposed tor connection at one and the saine side of the switch structure, a row of jacks on the same side ot said structure. and conductors electrically connecting said terminals and jacks S. An automatic telephone switch structure comprising av frame, bank contacts arranged in a plurality of rows and having their connecting ends exposed for connection at one side ot the switch Structure, a coperating wiper, means for advancing said wiper by a primary motion to the different rows of said contacts, means for advancing said wiper by a secondary motion to the contacts ot a selected row, means for releasing said wiper and restoring it to normal, three electromagnets for cont-rolling respectively said primary and secondary a vancing and said releasing means, individually detacl'iably se cured to said vtrame and having their terminals all exposed for connection at the same side ot said trame as the connecting ends of said bank contacts. a row ot. jacks on thc saine side of said structure` and conductors electrically connecting said terminals and jacks.

9. An automatic telephone switch structure comprising a frame, a bank of contacts detacliably connected with said frame, a cooperating wiper, an actuating shaft for said advancing and release magnets secured in said frame at substantially right angles to said shaft, said magnets constituting all the advancing and releasing magnets of said wiper.

1t). An automatic telephone switch structure comprising a frame. a bank of contacts dctachably connected with said traine, a co operating wiper, an actuating shaft tor said wiper movably mounted in said Jtrame. and advancing and release magnets secured in said frame at substantially right angles to said shaft and' the general direction Aof said contact-bank, said magnets constituting all the advancing and releasing magnets ot' said wiper.

11. An automatic telephone switch structure comprising a frame, a contact-bank detachably secured to said trame and having its contacts arranged in i'oi's, a cooperating wiper movable primarily to the different rows and secondarily to the contacts in the rows, an actuating shaft for said wiper mow ably mounted in said trame. a primary magnet and mechanism for actuating said sha't't to give'said wiper its primary movement. a secondary magnet and mechanism t'or giving said wiper its secondary movement, a release magnet tor `freeing said parts, and a spring for returning the. parts to normal when treed` said prii'nary, secondary and release magnets being secured in said traine at substantially right angles to said shaft.

1Q. An automatic telephone switch .strut-- ture comprising a traine, a contact-bank detachably secured to said fraaie and having its contacts arranged in rows` a cooperating wiper movable primarily to the dittei'ent rows and secondarily to the contacts in the rows, an actuating sha't't tor said wiper mov vably mounted in said frame, a primary inagnet and mechanism t'or actuating said shatt to give said wipci' its primary.movementf a secondary magnet and mechanism t'or giving said wiper its sectaidary n'iovenient., a release magnet tor freeing said parts, and a spring for returning the parts to normal. when treed, said primary, secondary and release magnets being secured in said trame at substantially right angles to said shatt and the general direction ot lsaid contactbank.

ably mounted in said trame, primarv and secondary magnets and mechanian coperating with said shaft to give saidwwiper its` irimarv and secondar i movements a release u 7 18. An automatic telephone switch struc connecti'oi'i at one and the same t wiper n'iovably mounted in said trame, and 65 magnet for freeing siiid parts, and a .spring for returning said parte to norma-l, said primary,secondary and release maglie s he ing secured in said traine at suhstantiaiiv right angles to said shaft,

1,4. Ao automatic telephone switch strucu ture comprising a traine, a contact-hunk detachahly secured to said traine and having its contacts arranged in rows, a cooperating wiper movable primarily to the diierent rows and secondarilyt-o the contacts in. thc rows, an actuating shait for said wiper inovi ahly mounted in said itran'ie, priinsry and secondary magnets and mechanism coperating with said shatt to give said Wiper its primary and secondary movements, a release magnet for freeing' said parte, and a. spring for returning said parte to normal, said priinary, secondary and release magnets being secured in said trarne at substantially right angles to said shaft and the general direction ot' said contact-bank. l i5. An automatic telephone switch structure comprising a Itraine, a contact-henk secured to seid traine, a cooperating Wiper, a

-sliaift for said wiper inovahly mounted in `said trarne, ratchet teeth oponsaid shat't,

and electrically operated pawl mechanism for engagingh said teeth to advance said shaft step by step, said mechanism compris ing an'electromagnet, anarinature estending iengthwise in said electromagnet, a pawl lseoimed lto said armature and 'extending at right angies thereto, stops and springs all arranged a unitary structure detachahly secured. to the switch freine,

i6. An automatic telephone switch structure comprising a frame, a contact-bank secured to said traine and having its contacts arranged in rows, a'coperating Wiper nievabie primarily to the diiterent rows and secondarily yto the contacts in the rows, an actu ating shaft tor said Wiper longitudinally' movable in said frame, ratchet teeth upon said shaft, and electricaliy operated pavvl mechanism :for engaging said teeth to advance said ,shaft step hy step, said mechanisni comprising an electromagnet, armature, @avi/i, stops and springs arti arranged a 1onitary structure detachahiy secured to the switch frame. I

' i7. An automatic telephone svvitch struc ture comprising a traine, a contact-bank secured to said trame, .a cooper ting Wiper, a shaft forl said Wiper movahij,r mounted in said traine, ratchet teeth: upon. said shaft, and electricaliy operated rsf-Wi mechanism for engaging said teeth to 'ice said shaft step hy'step', said mechanism comprising an eiectrornagnet, an armature extending length Wise in said electromagnet, a persil. secured to said armature and extending at right angies thereto, stops and springs ati arranged as a unitary structure detachahiy secured to nally movable in said traine, ratchet teeth upon said shaft, and electricall;Y operated:v

psivl mechanism for engaging said teeth to advance said shaft step hy step, said mecha nisln comprising an eiectroinegnet, arinature, pavvl, stops and springs all aranged as a unitary structure detachahly secured to the 'switch frame With the axis ot the elecvtrornagnet at right angles to said shaft.

19. An automat-ic telephone switchstruo ture comprising a treme, a contact-bank se* cured to said frame, a cooperating Wiper, an actuating,` shaft for said wiper longitudinally movable in said-traine, means for longitudinaily moving` said shaft to ad\.fance said Wiper, means for releasing said shaft, a

dash pot secured to said frame With its Wails about said shatt, and `Aa piston on said shaft positioned so as to enter said Jnot at the end of the return. stroke of said shaft and thereby cushion its return 20. in automatic telephone switch struc ture coiifnorisingn a, frame, a contacthank secured to said trarne and hes/"ing,` its contacts arranged in rows, a cooperating Wiper, a primary shattfor moving said wiper to dit ferent rovvs, a secondary shaft for moving said Wiper to contacts insaid rows, teeth on said primary shaft, a. locliingpawi for en gaging said teeth to loci: seid shaft against movement, a lever for actuatingI said pavvl, and a projection on said secondary shaftI positionedF so as to cause said lever to throw said pavvl into locking position upon the first advance step ont said secondary shaft and to Withdraw said pavvl upon the return of said secondary shaft to normal. 21. An automatic telephone svvitchstructure comprising a frame, a contact-bank securedto said traine and havingiits contacts arranged in rows, a cooperating Wiper, a primary shetftv for moving said wiper to different rows, a secondary shaft for moving said Wiper to contacts in said rows, teeth on said primary shaft, ay drivingpawl to e11- gage said teeth to' actnate said shaft, a loch ing pavvi to engage said teeth to lock said shaft against movement, a lever for actuating;l said paivh and a projection on said secondary shaft positioned so as to cause said lever to throw said pawl into locking position upon the first advance step oi said secondary shaft and to Withdraw said pawl upon the return ot" said secondary shaft to normal.

An automatic telephone switch structure comprising a frame, a contact-bank secured to said frame and having its contacts arranved in rows, a cooperating wiper, a rotate le primary shaft for moving said wiper to' different rows, a longitudinally movable shaft for moving said wiper to contacts in Said rows, primary magnet mechanism for rotating said primary shaft, secondary magnet mechanism for moving said shaft longitudinally, teeth on said primary sha ft, a locking pawl for engaging said teeth 'to lock said shaft against movement, a lever for actuating said pawl, and a projection on said secondary shaft positioned so as to cause said lever to throw said pawl into locking position upon the first advance step of said secondary shaft and to withdraw said pawl upon the return of said secondary shaft to normal,

An automatic telephone switch structure comprising a frame, a tumtact-banlt secured to said frame and having its contacts arranged in rows, a cooperating wiper, a primary shaft for moving said wiper to different rows, a secondary shaft for moving said wiper to contacts in said rows, primary magnet mechanism including driving and retaining pawls for actuatingl said primary shaft, secondary magnet mechanism including driving and retaining pawlsl for actuating said secondary shaft, said primary and secondary shafts lying in proximity to and substantially parallel to earl; other and said retaining pawls engaging each other so that when the one is moved to non-changing po sition lthe other will also be moved toits nonengaging position, a release magnet and mechanism for moving the former retaining pawl to its non-engaging position, and means for restoring said shafts to normal when said retaining pawls are in non-cngaging position.

ilfl. fin automatic telephone switch structure comprising a frame having two main supporting plates connected together at substantially right angles to each other, a contact-bank secured at the line of union of said plates and lying substantially in the plane of one of them, a cooperating wiper, substantially parallel primary and second ary actuating shafts extending through the other of said plates, primary and secondary magnet`inechanis1n including driving and retaining oawls for actuating said primary and secondary shafts respectively, said retaining pawls engaging cach other so that when one is moved to non-engaging position the other will also be moved to non-engaging position, a release magnet and mechanism for moving the formel retaining pawl to its non-engaging position,.and means for restoring said shafts to normal when said rc taining pawls are in non-ergaging position.

An automatic telephone switch :ai-uc masso ture comprising a frame, a contact-bank sevcured to said frame, a hollow actuating .shaft movably supported in said frame, a cooperating wiper mechanically connected to one end 'of said shaft and movable into engagem'ent with the contacts in said bank, a terminal contact on said frame, and a flexible conductor extending through said hollow .shaft and electrically uniting said wiper and terminal contact. I

ilo. An automatic telephone switch structure comprising a frame, a contact-bank secured to said frame, a cooperating wiper movable into engagement with contacts in said bank, primary and secondary shafts for moving said wiper,stepbystep mechanism for rotating one of said shafts and longitudinally moving the other, means for releasing said shafts, a spiral restoring spring for said rotating shaft closely coiled about it and suitably secured at its ends, a lever pivoted to the frame and secured at one end to the loi'igitudinally movable shaft, and a tension restoring spring for said shaft connected between said frame and said lever.

Q7. An automatic telephoneswitch struc ture comprising a frame, a contact bank secured to said frame and having its contacts arranged in vows, a cooperating wiper inov'-, able primarily Vto the different rows and secondarily to the contacts in the rows, substantially parallel rotary and longitudinallymovable shafts for bringing about these movements of the wiper, a pivot uniting said wiper at an intermediate point in its length to the rotary shaft, and a guide secured to the longitudinally movable shaft and comprising parallel plates extending substair tially at right angles to the latter shaft and lying omi-apposite sides of the non-contacting end of the wiper in all operative positions of the rotary shaft.

Q8. An automatic telephone switch structure comprising a frame having substantially parallel frame members, bank-contacts, a cooperating wiper, a rotary shaft for moving said wiper and lying substantially parallel to said frame members, an actuating magnet secured to one of saidmembers and extending .toward the other, a pivoted armature for said magnet having its free end lying near said other frame member, 'a ratchet on said shaft, a cooperating pawl pivoted to said armature, and a return spring for said armature adjustaljily secured to said other frame member.

Q9. An automatic telephone switch structure comprising a frame having a member provided with a long narrow slot, bank-contacts, a cooperating wiper, a longitudinally movable shaft for actuating said wiper lying in proximity to and in substantial parallel' ism with said slotted frame member, a guide pm extending from said shaft into said slot, means for advancing said shaft; step by step llO l .ture comprising ya frame having two plates' contact-ban crasse j ratchet teeth on said shaft, a retaining pawl pivoted adjacent to said member and extending substantially parallel thereto, and a spring for yieldingly holding said pawl in position to engage said teeth.

30. A n automatic telephone switch strucunited at richt angles toeach other and a slotted mem er at right 'angles to' theiirst plate and arallel to the second plate, a secured to said plates in line with the second plate, primary and. secondv bank andpivoted to said primary shaft and havingt, its noncontacting end actuated 'by ,said secondary shaft, al guide pin extending from said secondary shaft' into the slot of said slottedmember, primary and secondary magnets secured to" said second plate Vand extending toward said slotted member,ratchet vteeth on said primary and secondary-shafts, primary armature and pawl mechanism movable at right angles to said primary shaft for advancing it, a primary retaining pawl pivotally mounted upon said first plate, secondary armature and pawl mechanism movable in the direction of said secondary shaft to advance it, a secondary retaining pawl pivoted adjacent to said slotted member in a position to engage said primary retainingpawl in their movements, restoring springs for said primary and secondary shafts, a release magnet secured at one end to said second plate, and an armature for said release magnet to throw said retaining pawlsto their non-engaging positions. 3l.. An automatic telephone switch structure comprising a contact banlr, and a wiper 4 adapted for adjustment'relatively thereto, a

movable shaft for adjusting said wiper, a retaining awl for said shalt, a lever norf mally hol ing said pawl withdrawn 'from said shaft, a second lever and a magnet armature for actuating the same, a projection upon said second lever adapted to actuate said irst lever to free said pawl, said iirst lever including means adapted to interlock with said second.y lever and hold it in actu# ated position, a switch contact adapted to be forced to an alternate position by said second lever and held While said interlock exists, and a release magnet armature adapted to actuate 'the first lever to Adestroy said in terloclr, whereby said second leverand vsaid spring restore, said release-magnet armature also controlling said rst'lever to withdraw said retaining pawl.

32. An automatic telephone switch struc-` ture comprising a contact bank, and a wiper adapted for adjustment relatively thereto,a' movable shaft for adjusting said wiper, a retaining pawl for said shaft, a lever normally holding said pawl withdrawn from vsaid shaft, a second lever and a magnet armature `for actuating the same, a projection upon said second lever adapted to actuate said irst lever to free said pawl, said first lever including means adapted to interlock with said second lever and hold it in actuated position, a switch contact. adapted to be forced to an alternate position by said second lever and held while said interlock exists, and a release magnet armature adapted on attraction to actuate said first lever to retracted, operating said lirst lever to withdraw said retaining pawl.

33. An automatic telephone switch structure comprising a contact bank, and a wiper adapted for adjustment relatively thereto, a movable shaft for adjusting said wiper, a retaining pawl for said ratchet, a lever normally holding. said awl withdrawn from said shaft, a secondp lever and a magnet armature for actuating the same, a projection upon said'second lever adapted to actuate said rst ,lever to free said pavvl, said first lever including means adapted to interlock with said second lever and hold it in actuated position, a switch contact ladapt- Yed to be forced to an alternate position by said second lever and held while saidinten lock exists, a set of switch springs mounted on the switch structure, actuating said sprin a magnet having an a third lever forv destroy said interlock, said armature, whenarmature member a apted on energizat-ion to engage said lever and on denergization to actuate-the same to shift said springs, a releasel magnet armature adapted to be moved'in one direction to destroy said interloclr 4to free said second lever, said amature then serving to also free said third lever froml said actuating member, a device actuated bry said armature when moved in said direction to interlock with said third lever to prevent its restoration when so freed, and means for thereon moving said' armature in the opposite direction to actuato said first lever to withdraw said retaining pawl, said device then breaking its interlock with said third lever, whereby the latter is restored and said springs shifted to normal.

34. An automatic telephone switch structure comprising a frame, a bank of contacts detachablyconnected with said frame and having its contacts arranged coperating wipermovable in one direction to a desired group and then in a dilerent direction to a desired contact in that group, an actuating shaft for said wiper movably mounted in said frame, and advancing and release magnetsfor advancingfsaid wiper in said two directions and releasing it, said lmagnets being secured in said irame at substantially right angles to said shaft.

in groups, a

in said two directions and releasing it, sin in ets being; secured in said iframe at sub-- smitiliy right angie-s to said shaft and the genemi direction of said Contact bank.

En Witness wieieof, i" hereunto subscribe my naine this 15th day oi February, 1909.

V'LLi-Uvi KASLNG.

111s G. Emmons, 

